J/ApJ/695/276ivo://CDS.VizieR/J/ApJ/695/276doi:10.26093/cds/vizier.16950276CDSBennert N.Barvainis R.Henkel C.Antonucci R.2017-06-21T08:21:53Z2011-05-09T14:40:53ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleiseyfert-galaxiesradio-astronomyWe report a search for H_2_O megamasers in 274 SDSS type-2 active galactic nuclei (AGNs; 0.3<z<0.83), half of which can be classified as type-2 quasi-stellar objects (QSOs) from their [OIII]5007 luminosity, using the Robert C. Byrd Green Bank Telescope (GBT) and the Effelsberg 100m radio telescope. Apart from the detection of the extremely luminous water vapor megamaser SDSS J080430.99+360718.1, already reported by Barvainis & Antonucci (2005ApJ...628...89B), we do not find any additional line emission. This high rate of nondetections is compared to the water maser luminosity function created from the 78 water maser galaxies known to date and its extrapolation toward the higher luminosities of "gigamasers" that we would have been able to detect given the sensitivity of our survey. The properties of the known water masers are summarized and discussed with respect to the nature of high-z type-2 AGNs and megamasers in general. In the Appendix (tables 4 and 5), we list 173 additional objects (mainly radio galaxies, but also QSOs and galaxies) that were observed with the GBT, the Effelsberg 100m radio telescope, or Arecibo Observatory without leading to the detection of water maser emission.2009ApJ...695..276Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/695/276CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)VII/113 : Catalogued Galaxies + QSOs observed in IRAS, V2 (IPAC, 1989)J/ApJ/678/96 : Extragalactic H2O masers (Braatz+, 2008)J/ApJ/658/1096 : H2O maser classification (Deacon+, 2007)J/PASJ/59/1185 : Water maser in galactic IRAS sources (Sunada+, 2007)J/ApJ/652/136 : Water maser emission in five AGNs (Kondratko+, 2006)J/MNRAS/362/9 : Radio-loud AGN in SDSS (Best+, 2005)J/AJ/128/1002 : SDSS candidate type II quasars. II (Zakamska+, 2004)J/AJ/126/2125 : SDSS candidate type II quasars (Zakamska+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/695/276https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/695/276http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/695/276https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/695/276https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/695/276http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/695/276GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/695/276/table2 (The 78 galaxies at D>=100kpc with known H_2_O masers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/695/276/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/695/276/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/695/276/table2?GETtext/xml+votable180.050000true2.47333325.9230560.005555555555555556Cone search capability for table J/ApJ/695/276/appendix (Details of observations: radio galaxies and miscellaneous sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/695/276/appendix?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/695/276/appendix?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/695/276/appendix?GETtext/xml+votable180.050000true2.7812517.4966670.005555555555555556Cone search capability for table J/ApJ/695/276/table1 (Details of observations: 274 SDSS type-2 AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/695/276/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/695/276/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/695/276/table1?GETtext/xml+votable180.050000true121.12912536.12169440.0055555555555555566/0 553 736 946 963 1008 2075 2125 2154 2155 2225 2229 2241 2266 2313 2327 2390 2564 2569 2600 2761 3042 3506 4097 4102 4106 4109 4114 4173 4368 4629 4708 4772 4775 4822 4829 4831 4855 4930 5016 5028 5041 5052 5068 5130 5319 5356 5369 5391 5563 5677 5690 5745 5747 5755 5793 5795 5806 5819 5861 5867 5877 5878 5906 5962 5995 6009 6015 6022 6034 6046 6072 6096 6098 6115 6123 6129 6161 6252 6341 6352 6355 6357 6403 6417 6418 6429 6430 6440 6444 6461 6465 6470 6476 6527 6539 6540 6542 6543 6547 6559 6561 6562 6593 6610 6626 7037 7132 7157 7183 7184 7201 7207 7214 7229 7243 7262 7284 7285 7300 7360 7424 7434 7435 7446 7456 7467 7477 7479 7498 7522 7550 7552 7606 7741 7869 8106 8216 8230 8288 8556 8626 8644 8769 8981 8997 9201 9243 9287 9419 9425 9437 9439 9512 9605 9625 9632 9672 9764 9796 9924 9965 9992 10004 10075 10087 10104 10202 10229 10364 10404 10529 10593 10601 10643 10645 10719 10787 10912 10927 10977 11027 11029 11103 11147 11224 11239 11316 11333 11344 11354 11363 11369 11404 11456 11498 11507 11562 11646 11667 11742 11816 11851 11936 11948 12306 12338 12359 12556 12593 12673 12687 12693 12796 13074 13224 13287 13450 15345 15973 16034 16035 16045 16047 16062 16120 16189 16655 16690 17229 17406 17407 17492 17497 17509 17525 17725 17726 17750 17753 17754 17755 17756 17763 17767 17768 17770 17771 17772 17773 17774 17776 17806 17816 17825 17826 17827 17830 17831 17834 17836 17857 18001 18006 18007 18008 18009 18019 18022 18028 18029 18041 18068 18072 18075 18093 18112 18212 18227 18231 18323 18339 18390 18401 18434 18520 18537 18541 18649 18685 18686 18750 18751 18772 18773 18790 18792 18829 18830 18831 18839 18844 18853 18860 18907 18913 18929 19028 19050 19052 19111 19390 19395 19443 19557 19613 19713 19745 19798 19822 19872 19994 20000 20034 20051 20122 20167 20254 20369 21845 21847 21855 21959 21996 22002 22398 22972 23035 23103 23182 23190 23193 23196 23197 23198 23201 23202 23204 23205 23207 23208 23212 23214 23216 23218 23234 25596 25845 25847 25851 25907 25910 25911 25916 25946 25949 25950 25953 25960 25971 25973 25979 26018 26021 26024 26058 26188 26246 26267 26285 26292 26293 26310 26316 26336 26457 26511 27046 27058 27083 27195 27220 27234 27241 27242 27246 27249 27255 27257 27260 27293 27302 27304 27311 27313 27315 27332 27337 27342 27346 27351 27355 27366 27392 27436 27446 27473 27521 27681 27743 27767 27880 27908 28046 28142 28376 28590 28648 29963 30031 30037 30076 30114 30140 31083 31127 31158 31295 31333 31338 31346 31374 31422 31423 31425 31533 31575 31589 31696 31940 31951 32330 32338 32508 32682 32908 34534 35691 36785 36792 36812 36862 38703 38868 40384 40447 41586 42016 43233 43339 43585 44553 44660 44812 45047 45115 45735 467159.932213363424795e-25 9.932213363424795e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/695/276?format=asciiRadiodefaultJ/ApJ/695/276/table2The 78 galaxies at D>=100kpc with known H_2_O masersNameSource namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Name[ad] Note for NGC 598 (1)meta.codecharONameOther namemeta.idcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.maincz? Systemic velocity from NEDkm/sphys.velocintnullablef_cz[z] For SDSS J0804+3607, z=0.66meta.codecharDist? Distance (2)Mpcpos.distance;pos.galactocentricfloatnullableLFIR? Far_infrared (FIR) luminosity (log(L_FIR_/L_{sun}_)) (3)log(solLum)phys.luminosity;em.IRfloatnullablef_LFIR[bhi] lower limit or missing measurements (4)meta.codecharTdust? Dust temperature (4)(3)Kphys.temperatureintnullableLH2OH_2_O luminosity (log(L_H_2_O_/L_{sun}_), using H_0_=75km/s/Mpclog(solLum)phys.luminosityfloatf_LH2O[cef] Note on LH2O computation (5)meta.codecharMtypeHost galaxy morphological type from NEDsrc.morph.typecharf_Mtype[j] Flag on Mtype (6)meta.codecharOtypeActivity type from NED (7)meta.note;src.morph.typecharf_Otype[g] Flag on Otype (8)meta.codecharRefReference(s) number(s); see refs.dat filemeta.idcharSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDScharJ/ApJ/695/276/refsReferences for table 2AutAuthor's namemeta.bib.authorcharRefReference numbermeta.id;meta.mainintBibCodeBibcodemeta.bib.bibcodecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintComCatalog reference in VizieRmeta.notecharJ/ApJ/695/276/appendixDetails of observations: radio galaxies and miscellaneous sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource identificationmeta.id;meta.maincharOSimbad column added by the CDSsrc.classcharClassNED Classification (for table 5 only)src.classcharRAJ2000NED Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000NED Degree of Declination (J2000)pos.eq.dec;meta.mainzNED Heliocentric redshiftsrc.redshiftfloatnuObserved frequencyMHzem.freqdoublermsRoot mean square flux densitymJystat.errorfloatvminMinimum velocity covered by observationkm/sinstr.bandwidthintvmaxMaximum velocity covered by observationkm/sinstr.bandwidthintdvChannel widthkm/sspect.line.widthfloatTelTelescope used (G1)instr.setupcharEpochDate of observation in MMYY formattime.epochintSimbadNameSimbad column added by the CDSmeta.idcharNEDnameSimbad column added by the CDSmeta.idcharJ/ApJ/695/276/table1Details of observations: 274 SDSS type-2 AGNsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSource identification (1)meta.id;meta.maincharzHeliocentric redshift (2)src.redshiftfloatL[OIII]Log of [OIII] luminosity (3)log(solLum)phys.luminosityfloatF20cm? FIRST 20cm integrated flux (4)mJyphot.flux.density;em.radio.750-1500MHzfloatnullablef_F20cm[n] 'n' if field not observed by FIRST surveymeta.codecharnuObserved frequencyMHzem.freqdoublermsRoot mean square flux densitymJystat.errorfloatvminMinimum velocity covered by observationkm/sinstr.bandwidthintvmaxMaximum velocity covered by observationkm/sinstr.bandwidthintdvChannel widthkm/sspect.line.widthfloatTelTelescope used (G1)instr.setupcharEpochDate of observation in MMYY formattime.epochintDR7Display the SDSS-DR7 photometric catalog (Adelman-McCarthy et al. 2009, Cat. II/294)meta.ref.urlcharSloanDisplay the SDSS data for this sourcemeta.ref.urlcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_RAPositions from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS name (declination part)degpos.eq.dec;meta.main